BACKGROUND OF THE INVENTION
1. Field of the Invention
[0001] The present invention relates to a method of recording information data to a recording
medium.
2. Description of Related Art
[0002] As a type of DVD (digital versatile disk) that is an optical recording medium, there
is what is known as DVD-ROM (read only memory) which has recording surfaces in two
layers on one disc. In a DVD-ROM, movie software, computer data, or the like having
a capacity on the maximum of 8.5 gigabytes is recorded and such a DVD-ROM is provided
for the use of general user.
[0003] Besides read-only type discs such as the DVD-ROM, other types of DVD, i.e., DVD-R
in which information data can be written only once by a user, and DVD-RAM in which
written information data can be rewritten are being put to practical use.
[0004] In manufacturing a DVD recorder for recording information data on the DVD-RAM or
the DVD-R, a method for preventing illegal copy of the contents of a DVD-ROM in which
video software is recorded is desired.
[0005] US-A-5,729,525 discloses a two-layer optical disk having a first recording layer
and a second recording layer for storing data. Data to be recorded onto the optical
disc is divided in two data blocks to be recorded in the first and second recording
layers, respectively. When reading the data from the two-layer optical disk, the data
are read alternately from the first and second recording layers by using a table indicating
addresses for determining the starting positions of the recorded data blocks in a
control data area.
SUMMARY AND OBJECTS OF THE INVENTION
[0006] It is an object of the invention to provide an improved information data recording
method and an improved information data recording apparatus which can prevent illegal
copy of information data recorded in a multi-layer disk.
[0007] This object is achieved by a recording method as defined in claim 1, a recording
apparatus as defined in claim 5, and a recording medium as defined in claim 9.
[0008] According to the invention, there is provided a recording method of recording a series
of information data onto a recording medium having a plurality of recording layers,
comprising dividing said information data into a plurality of data blocks and distributing
and recording said data blocks into the different recording layers of said recording
medium, wherein at least a first data block of said data blocks recorded in one of
said different recording layers includes a jump instruction to designate a next reading
destination in another one of said different recording layers.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009]
Fig. 1 is a diagram showing the construction of a master recording apparatus for recording
information to a recording disc on the basis of a recording method according to the
invention;
Fig. 2 is a diagram showing an example of an operation flow for performing a data
separating operation;
Figs. 3A to 3C are diagrams showing an example of information data and separated information
data for first and second recording layers;
Fig. 4 is a diagram showing jump destination addresses by jump instructions JA1 to JA5;
Fig. 5 is a diagram showing an example of a recording format of a DVD-ROM;
Figs. 6 and 7 are diagrams showing recording directions of recording layers in a parallel
track system and an opposite track system;
Fig. 8 is a flowchart showing a data separating operation which is performed when
information data is recorded onto a recording disc by the opposite track system;
Fig. 9 is a diagram showing jump destination addresses of the jump instructions JA1 to JA5 which are generated when information data is recorded onto the recording disc by
the opposite track system;
Fig. 10 is a diagram showing an example of a recording format of a DVD-ROM to which
information data has been recorded by the opposite track system;
Fig. 11 is a diagram showing another example of a recording format of a DVD-ROM to
which information data has been recorded by the opposite track system; and
Fig. 12 is a diagram showing another example of a recording format of the DVD-ROM
to which information data has been recorded by the opposite track system.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0010] Fig. 1 is a diagram showing a construction of a master recording apparatus for recording
a pit train having information data such as video software or the like onto two glass
mother discs (hereinafter, referred to as a first recording mother disc 20 and a second
recording mother disc 21) for transferring the pit train to a DVD-ROM having recording
surfaces of two layers on based on a recording method of the invention.
[0011] In Fig. 1, a data dividing circuit 10 first divides information data supplied so
as to be recorded to the first recording mother disc 20 corresponding to a first recording
layer of a DVD-ROM into data blocks each having a predetermined capacity and adds
a jump instruction for jumping a reproducing head of a reproducing apparatus (DVD
player) which is not shown to the end of each of the data blocks. In the jump instruction,
an address showing a jump destination of the reproducing head is also set. The data
dividing circuit 10 further divides the data block series to which the jump instructions
were added as mentioned above into two groups of an odd number designated data block
group and an even number designated data block group. The data dividing circuit 10
writes the odd number designated data block group as information data for the first
recording layer into a data memory 11 for recording the first layer and the even number
designated data block group as information data for the second recording layer into
a data memory 12 for recording the second layer.
[0012] Fig. 2 is a diagram showing an example of an operation flow for performing the data
separating operation as mentioned above. The operation flow is performed by a CPU
(not shown) for controlling the data dividing circuit 10.
[0013] In Fig. 2, first, the CPU stores a recording start address AD10 in the first recording
layer of the DVD-ROM and a recording start address AD20 in the second recording layer
into registers L1 and L2 (not shown) built in the CPU, respectively (step S31). Subsequently,
the CPU reads information data supplied to be recorded onto the recording mother disc
20 every data block of the predetermined capacity and stores it into a register Y
(not shown) (step S32). The CPU discriminates whether EOF indicative of the end position
of the information data exists in the fetched data block or not (step S33). When it
is determined in step S33 that the EOF does not exist, the CPU discriminates whether
the data block fetched into the register Y is the odd number block or not (step S34).
[0014] When it is determined that it is the odd number block in step S34, a flag "1" indicative
of the odd number block is stored into a flag resistor F (not shown) (step S35). Subsequently,
the CPU generates a jump instruction JA to an address position (address position on
the first recording layer) stored in the register L1 (step S36). The CPU reads out
the data block fetched into the register Y and stores the data block in which the
jump instruction JA was added to the end into the data memory 11 for recording the
first layer (step S37). The CPU overwrites and stores a new address obtained by adding
a block data capacity B of one data block including the jump instruction JA to the
address stored in the register L1 into the register L1 (step S38). After completion
of step S38, the CPU returns to the execution of step S32.
[0015] On the other hand, when it is determined in step S34 that the data block fetched
in the register Y is not the odd number block, the CPU stores a flag "0" indicative
of the even number block into the flag register F (step S39). The CPU generates the
jump instruction JA to an address position (address position on the second recording
layer) stored in the register L2 (step S40). The CPU reads out the data block fetched
in the register Y and stores the data block in which the jump instruction JA was added
to the end into the data memory 12 for recording the second layer (step S41). Subsequently,
the CPU overwrites and stores a new address obtained by adding the block data capacity
B of one data block including the jump instruction JA to the address stored in the
register L2 into the register L2 (step S42). After completion of step S42, the CPU
returns to the execution of step S32.
[0016] When it is determined in step S33 that the EOF indicative of the end position of
the information data exists in the data block stored in the register Y, the CPU discriminates
whether the storage contents of the flag register F indicate the flag "1" or not (step
S43). When it is determined in step S43 that the storage contents of the flag register
F indicate the flag "1", the CPU stores the EOF indicative of the end position of
the information data into the data memory 11 for recording the first layer (step S44).
On the other hand, when it is determined in step S43 that the storage contents of
the flag register F do not show the flag "1", the CPU stores the EOF indicative of
the end position of the information data into the data memory 12 for recording the
second layer (step S45). When either step S44 or S45 is finished, the CPU exits the
data separation flow and returns to the execution of a main routine (not described).
[0017] Fig. 3 is a diagram showing an example of the separation result of the information
data executed by the operation flow.
[0018] That is, when an information data series as shown in Fig. 3A is supplied to the data
dividing circuit 10, the data dividing circuit 10 divides the information data into
data blocks D
1 to D
6 each having a predetermined data capacity and sequentially fetches them on a data
block unit basis. Subsequently, the data dividing circuit 10 divides the data blocks
D
1 to D
6 into odd number designated data blocks D
1, D
3, and D
5 and the even number designated data blocks D
2, D
4, and D
6. The data dividing circuit 10 adds jump instructions JA
1, JA
3, and JA
5 (which will be described later) to the ends of the odd number data blocks D
1, D
3, and D
5, respectively, and connects them, thereby forming information data for the first
recording layer. In this instance, the capacity of each data block including the jump
instruction is equal to the block data capacity B as mentioned above. The data dividing
circuit 10 adds jump instructions JA
2, and JA
4 (which will be described later) to the ends of the even number data blocks D
2, D
4, and D
6, (except the last data block D
6 ) as shown in Fig. 3(C), respectively, and connects them, thereby obtaining information
data for the second recording layer. In this case, the capacity of each data block
including the jump instruction is equal to the block data capacity B.
[0019] Fig. 4 is a diagram showing the jump destination addresses indicated by the jump
instructions JA
1 to JA
5.
[0020] As shown in Fig. 4, the jump destination address by the jump instruction JA
1 which is added to the end of the data block D
1 is the address AD20 showing the recording start position for the second recording
layer of the DVD-ROM. That is, in the reproducing operation, the jump instruction
JA
1 is an instruction to jump the pickup from the first recording layer of the DVD-ROM
to the address AD20 of the second recording layer. The address AD20 shows the head
position of the data block D
2 on the DVD-ROM. The jump destination address by the jump instruction JA
2 which is added to the end of the data block D
2 is an address AD11 obtained by adding the block data capacity B to the address AD10
showing the recording start position for the first recording layer of the DVD-ROM.
That is, in the reproducing operation by the reproducing apparatus, the jump instruction
JA
2 is an instruction to jump the pickup from the second recording layer of the DVD-ROM
to the address AD11 of the first recording layer. The address AD11 shows the head
position of the data block D
3 on the DVD-ROM. The jump destination address by the jump instruction JA
3 which is added to the end of the data block D
3 is an address AD21 obtained by adding the block data capacity B to the address AD20.
That is, in the reproducing operation by the reproducing apparatus, the jump instruction
JA
3 is an instruction to jump the pickup from the first recording layer of the DVD-ROM
to the address AD21 of the second recording layer. The address AD21 shows the head
position of the data block D
4 on the DVD-ROM. The jump destination address by the jump instruction JA
4 which is added to the end of the data block D
4 is an address AD12 obtained by adding the block data capacity B to the address AD11.
That is, in the reproducing operation by the reproducing apparatus, the jump instruction
JA
4 is an instruction to jump the pickup from the second recording layer of the DVD-ROM
to the address AD12 of the first recording layer. The address AD12 shows the head
position of the data block D
5 on the DVD-ROM. The jump destination address by the jump instruction JA
5 which is added to the end of the data block D
5 is an address AD22 obtained by adding the block data capacity B to the address AD21.
That is, in the reproducing operation by the reproducing apparatus, the jump instruction
JA
5 is an instruction to jump the pickup from the first recording layer of the DVD-ROM
to the address AD22 of the second recording layer. The address AD22 shows the head
position of the data block D
6 on the DVD-ROM.
[0021] The information data for the first recording layer and the information data for the
second recording layer having the formats as mentioned above are written into the
data memory 11 for recording the first layer and the data memory 12 for recording
the second layer, respectively.
[0022] When a recording start instruction is supplied from a control circuit 17, the data
dividing circuit 10 sequentially reads out the information data for the first recording
layer as shown in Fig. 3B from the data memory 11 for recording the first layer and
supplies to a recording data encoder 13.
[0023] The recording data encoder 13 (8/16)-modulation encodes the information data supplied
from the data dividing circuit 10, thereby generating an (8/16)-modulation signal.
Subsequently, the recording data encoder 13 converts the (8/16)-modulation signal
into a binary serial signal and supplies it as a recording signal to a recording head
14. A slider mechanism 15 moves the recording head 14 to the position on the DVD-ROM
according to a recording position signal which is supplied from the control circuit
17. The recording head 14 irradiates a recording beam of a light amount according
to the recording signal supplied from the recording data encoder 13 onto the recording
mother disc 20 which is rotated by a spindle motor 16, thereby recording the recording
signal.
[0024] After completion of the whole recording of the recording signal based on the information
data for the first recording layer to the first recording mother disc 20, the recording
mother disc 20 is exchanged to the second recording mother disc 21 to which the recording
signal based on the information data for the second recording layer should be recorded.
After that, the data dividing circuit 10 sequentially reads out the information data
for the second recording layer as shown in Fig. 3C from the data memory 12 for recording
the second layer and supplies it to the recording data encoder 13. The recording data
encoder 13 generates the recording signal as mentioned above based on the supplied
information data and supplies it to the recording head 14. The recording head 14 irradiates
the recording beam of the light amount according to the supplied recording signal
onto the recording mother disc 21, thereby recording the recording signal based on
the information data for the second recording layer.
[0025] By executing an electroforming process or the like to each of the first recording
mother disc 20 and second recording mother disc 21 on which the recording signals
were recorded as mentioned above, a stamper for the first recording layer and a stamper
for the second recording layer are manufactured, respectively. A half mirror film
is sputtered onto the disc for the first recording layer formed by the stamper for
the first recording layer. A high reflecting film is sputtered onto the disc for the
second recording layer formed by the stamper for the second recording layer. Both
discs are adhered, thereby completing a DVD-ROM having the recording surfaces of two
layers.
[0026] A more detailed manufacturing method of the DVD-ROM having the recording surfaces
of two layers has been disclosed, for example, in Japanese Patent Kokai No. 8-96406
(JP-A-8-96406).
[0027] Fig. 5 is a diagram showing a recording format of information data on the DVD-ROM
having the recording surfaces of two layers manufactured by the method as mentioned
above from the first recording mother disc 20 and second recording mother disc 21
when the information data for the first and second recording layers shown in Figs.
3B and 3C are recorded onto the first recording mother disc 20 and second recording
mother disc 21.
[0028] As shown in Fig. 5, the information data for the first recording layer shown in Fig.
3B is sequentially recorded from the position of the address AD10 in the first recording
layer of the DVD-ROM. Similarly, the information data for the second recording layer
shown in Fig. 3C is sequentially recorded from the position of the address AD20 in
the second recording layer of the DVD-ROM.
[0029] When the DVD-ROM having the above recording format is loaded to a DVD player and
the reproducing operation is started, the pickup of the DVD player first starts to
read the information from the position of the address AD10. That is, the DVD player
reproduces the data block D
1 and generates its reproduction signal.
[0030] When the reproduction of the data block D
1 is finished, the pickup of the DVD player reads the jump instruction JA
1. In this instance, as shown in Fig. 4, the jump instruction JA
1 is an instruction to jump the pickup to the position of the address AD20. The pickup
of the DVD player, therefore, jumps to the position of the address AD20 in the second
recording layer of the DVD-ROM in response to the jump instruction and restarts the
ordinary reading operation from this position. That is, in this instance, the DVD
player reproduces the data block D
2 and generates its reproduction signal.
[0031] When the reproduction of the data block D
2 is finished, the pickup of the DVD player reads the jump instruction JA
2. In this instance, as shown in Fig. 4, the jump instruction JA
2 is an instruction to jump the pickup to the position of the address AD11. The pickup
of the DVD player, therefore, jumps to the position of the address AD11 in the first
recording layer of the DVD-ROM in response to the jump instruction and restarts the
ordinary reading operation from this position. That is, in this instance, the DVD
player reproduces the data block D
3 and generates its reproduction signal.
[0032] It is assumed that the second layer recording start address AD20 is an address which
is located on the disc outer periphery rather than the first layer recording start
address AD10 and on the disc inner periphery rather than the address AD11.
[0033] When the reproduction of the data block D
3 is finished, the pickup of the DVD player reads the jump instruction JA
3. In this instance, as shown in Fig. 4, the jump instruction JA
3 is an instruction to jump the pickup to the position of the address AD21. The pickup
of the DVD player, therefore, jumps to the position of the address AD21 in the second
recording layer of the DVD-ROM in response to the jump instruction and restarts the
ordinary reading operation from this position. That is, in this instance, the DVD
player reproduces the data block D
4 and generates its reproduction signal.
[0034] When the reproduction of the data block D
4 is finished, the pickup of the DVD player reads the jump instruction JA
4. In this instance, as shown in Fig. 4, the jump instruction JA
4 is an instruction to jump the pickup to the position of the address AD12. The pickup
of the DVD player, therefore, jumps to the position of the address AD12 in the first
recording layer of the DVD-ROM in response to the jump instruction and restarts the
ordinary reading operation from this position. That is, in this instance, the DVD
player reproduces the data block D
5 and generates its reproduction signal.
[0035] When the reproduction of the data block D
5 is finished, the pickup of the DVD player reads the jump instruction JA
5. In this instance, as shown in Fig. 4, the jump instruction JA
5 is an instruction to jump the pickup to the position of the address AD22. The pickup
of the DVD player, therefore, jumps to the position of the address AD22 in the second
recording layer of the DVD-ROM in response to the jump instruction and restarts the
ordinary reading operation from this position. That is, in this instance, the DVD
player reproduces the data block D
6 and generates its reproduction signal.
[0036] The embodiment is adapted to what is called a parallel track system such that the
recording track on each of the recording surfaces of two layers of the DVD-ROM is
directed from the disc's inner rim to the outer rim as shown by hatched arrows in
Fig. 6.
[0037] In the invention, however, as shown by hatched arrows in Fig. 7, the invention can
be also applied to an opposite track system such that the recording tracks on the
recording surfaces of two layers are formed toward the different directions.
[0038] Fig. 8 is a diagram showing an example of a data separating flow made in consideration
of the above point.
[0039] The data separating flow is executed by a CPU to control the data dividing circuit
10 in a manner similar to that shown in Fig. 2.
[0040] In Fig. 8, the CPU first stores the initial jump destination address AD21 into the
register L1 built in the CPU (step S51). The CPU reads the information data supplied
so as to be recorded onto the recording mother disc every data block as much as a
predetermined capacity and stores it into the register Y (step S52). The CPU subsequently
discriminates whether the EOF indicative of the end position of the information data
exists in the fetched data block or not (step S53). When it is determined in step
S53 that no EOF exists, the CPU discriminates whether the data block fetched into
the register Y is the odd number designated block or not (step S54).
[0041] In step S54, when it is decided that the data block is the odd number designated
block, the CPU stores a flag "1" indicative of the odd block into the flag register
F (step S55). The CPU subsequently forms the jump instruction JA to the address position
(address position on the first recording layer) stored in the register L1 (step S56).
The CPU reads out the data block fetched into the register Y and stores the data obtained
by adding the jump instruction JA to the end of the data block into the data memory
11 for recording the first layer (step S57). The CPU overwrites and stores the new
address obtained by adding the block data capacity B of one data block including the
jump instruction JA to the address stored in the register L1 into the register L1
(step S58). After the end of step S58, the CPU is returned to the execution of step
S52.
[0042] When it is determined in step S53 that the data block fetched in the register Y is
not the odd block, the CPU stores a flag "0" indicative of the even number designated
block into the flag register F (step S59). The CPU reads out the address stored in
the register L1 and generates the jump instruction JA to the address position (address
position on the second recording layer) represented by a complement value of the address
(step S60). For example, when the address stored in the register L1 is "00FF" (HEX),
since the complement value of the address is "FF01" (HEX), the jump instruction JA
to jump the pickup to the address position shown by the complement value is generated.
The CPU reads out the data block fetched in the register Y and stores the data obtained
by adding the jump instruction JA to the end of the data block into the data memory
12 for recording the second layer (step S61). After the end of step S61, the CPU is
returned to the execution of step S52.
[0043] In step S53, when it is determined that the EOF showing the end position of the information
data exists in the data block stored in the register Y, the CPU discriminates whether
the storage contents of the flag register F indicates the flag "1" or not (step S62).
In step S62, when it is decided that the storage contents of the flag register F indicate
the flag "1", the CPU stores the EOF showing the end position of the information data
into the data memory 11 for recording the first layer (step S63). In step S62, when
it is determined that the storage contents of the flag register F do not indicate
the flag "1", the CPU stores the EOF showing the end position of the information data
into the data memory 12 for recording the second layer (step S64). When either step
S63 or S64 is finished, the CPU exits the data separating flow and is returned to
the execution of the main routine (which is not explained).
[0044] By the execution of the data separating flow, the information data for the first
recording layer and the information data for the second recording layer are stored
in the formats shown in Figs. 3B and 3C into the data memory 11 for recording the
first layer and the data memory 12 for recording the second layer, respectively. In
case of recording the information data, however, by the opposite track system as mentioned
above, the jump destination address by each of the jump instructions JA
1 to JA
5 is as shown in Fig. 9.
[0045] The operation when the information data for the first recording layer and the information
data for. the second recording layer are recorded onto the first and second recording
mother discs by the opposite track system will now be described. When executing the
recording, first, the data dividing circuit 10 sequentially reads out the information
data for the first recording layer as shown in Fig. 3B from the head block from the
data memory 11 for recording the first layer and supplies it to the recording data
encoder 13. In accordance with the operation as shown in Fig. 10, the recording head
14 sequentially records the recording signal corresponding to each of the information
data D
1, JA
1, D
3, JA
3, D
5, and JA
5 for the first recording layer from the position of the predetermined address AD10
in the first recording layer of the DVD-ROM in the direction of disc's outer rim.
[0046] When the recording to the first recording layer is finished, the recording mother
disc 20 is exchanged to the second recording mother disc 21. After that, the data
dividing circuit 10 sequentially reads out the information data for the second recording
layer as shown in Fig. 3B from the last block from the data memory 12 for recording
the second layer and supplies it to the recording data encoder 13. In accordance with
this operation, as shown in Fig. 10, the recording head 14 sequentially records the
recording signal corresponding to each of the information data D
6, EOF, D
4, JA
4, D
2, and JA
2 for the second recording layer from the position of the address AD20 in the second
recording layer of the DVD-ROM in the direction of disc's inner rim.
[0047] When the DVD-ROM having the recording format as shown in Fig. 10 is loaded into the
DVD player and the reproducing operation is started, the pickup of the DVD player
first starts to read the information from the position of the address AD10 in the
first recording layer. That is, the DVD player reproduces the data block D
1 and generates its reproduction signal. When the reproduction of the data block D
1 is finished, the pickup of the DVD player reads the jump instruction JA
1. In this instance, as shown in Fig. 9, the jump instruction JA
1 is an instruction to jump the pickup to the position of the address AD21. In response
to the jump instruction, therefore, the pickup of the DVD player jumps to the position
of the address AD21 in the second recording layer of the DVD-ROM and starts the reading
operation toward the disc's inner rim direction from that point. That is, in this
case, the DVD player reproduces the data block D
2 and generates its reproduction signal. When the reproduction of the data block D
2 is finished, the pickup of the DVD player reads the jump instruction JA
2. In this instance, as shown in Fig. 9, the jump instruction JA
2 is an instruction to jump the pickup to the position of the address AD11. In response
to the jump instruction, therefore, the pickup of the DVD player jumps to the position
of the address AD11 in the first recording layer of the DVD-ROM and starts the reading
operation toward the disc outer rim direction from here. In this instance, that is,
the DVD player reproduces the data block D
3 and generates its reproduction signal.
[0048] After that, while the pickup of the DVD player similarly jumps between the first
recording layer and the second recording layer in response to the jump instruction
JA read out from the DVD-ROM, the pickup sequentially reads and reproduces the information
data D
4 to D
6 by repeating the reversal (disc inner rim direction/outer rim direction) of the reading
direction.
[0049] In the recording format shown in Fig. 10, the odd blocks in the information data
are recorded into the first recording layer and the even blocks are recorded into
the second recording layer. The invention, however, is not limited to the above recording
format.
[0050] For instance, as shown in Fig. 11, it is also possible to record only the data block
D
2 and jump instruction JA
2 into the second recording layer and to sequentially record the other data blocks
into the first recording layer. In this instance, although the jump instruction JA
1 showing the jump destination to the head position of the data block D
2 is added to the end of the data block D
1, there is no need to add the jump instruction to the end of each of the other data
blocks D
3 to D
5. That is, in Fig. 11, the jumping operation between the first and second recording
layers is executed in only the head portions (data blocks D
1, D
2) of the information data blocks. As shown in Fig. 12, if only the head data block
D
1 in the information data is recorded into the second recording layer and the other
data blocks are continuously recorded into the first recording layer, it is sufficient
to use only one jump instruction (jump instruction JA
1). According to the recording format shown in Fig. 11, the reading start position
of the information data is set to the address AD21 of the second recording layer and
the jump destination address by the jump instruction JA
1 is set to the address AD10 of the first recording layer.
[0051] In the embodiment, although the method of recording to the recording disc having
only two recording layers has been described, the invention can be also applied to
a multilayer disc having three or more recording layers.
[0052] In the recording method according to the invention as mentioned above, when a series
of information data such as movie software is recorded to the multilayer disc having
a plurality of recording surfaces, the information data is divided into a plurality
of data blocks of every predetermined data capacity and those data blocks are distributed
and recorded into the respective recording layers. Further, a jump instruction showing
the next reading destination is additionally recorded to at least one of the data
blocks. The jump instruction indicates the jump destination to the other recording
layer.
[0053] When the recording information is, therefore, read out from the DVD-ROM on which
the information has been recorded on the basis of the recording method, the jump instruction
as mentioned above appears in the read signal (RF signal) which is generated from
the pickup.
[0054] If the read signal is, therefore, directly used and an illegal copy is tried to a
DVD-R having the recording surface of only one layer or a DVD-RAM, the jump instruction
is intermittently mixed into the information data. In this instance, since the other
recording layers do not exist in the single-layer disc such as a DVD-RAM (DVD-R),
if the jump instruction as mentioned above is reproduced at the time of the information
reproduction, the normal reproduction is not performed.
[0055] That is, according to the invention, the illegal copy from the multilayer disc (DVD-ROM)
to the single-layer disc (DVD-RAM, DVD-R) directly using the read signal (RF signal)
which is generated from the pickup can be prevented.
[0056] In the embodiment, although the next data block is recorded just after each jump
instruction, it is also possible to insert a noise image signal which generates an
inharmonious feeling into a boundary between a jump instruction and a data block and
to record a resultant signal. In this case, on the reproducing apparatus side, after
completion of the execution of the jumping operation, the read signal generated from
the pickup is masked for only a predetermined period (period of time during which
the noise image signal exists) and, thereafter, a reproducing process is executed.
If an illegal copy, therefore, is tried to the DVD-RAM (or DVD-R) by directly using
the read signal generated from the pickup, the noise image signal is also copied and
a more effective copy prevention can be performed.
[0057] In the embodiment, by setting a boundary of each data block at a position in the
halfway of a GOP unit in the MPEG, the more effective copy prevention can be realized.
1. A recording method of recording a series of information data onto a recording medium
(20) having a plurality of recording layers, comprising
dividing said information data into a plurality of data blocks (D1-D6); and
distributing and recording said data blocks into the different recording layers of
said recording medium,
characterized in that
at least a first data block of said data blocks recorded in one of said different
recording layers includes a jump instruction (JA1-JA6) to designate a next reading destination (AD10-AD12, AD20-AD22) in another one of said different recording layers.
2. A method according to claim 1, wherein the recording layers of said recording medium
(20) comprise a first recording layer and a second recording layer, a group of odd
number designated blocks (D1, D3, D5) among said data blocks is recorded into said first recording layer, and a group
of even number designated blocks (D2, D4, D6) among said data block is recorded into said second recording layer.
3. A method according to claim 1, wherein, when said continuous information data is reproduced
from said recording medium, said jump instructions (JA1-JA6) causes a reproduction of said first data block to automatically jump to a reproduction
of a second data block in said other one of said different recording layers without
interruption.
4. A method according to claim 3, wherein said plurality of data blocks (D1-D6) recorded in said different recording layers are continuously reproduced without
interruption such that said continuous information data is reproduced without interruption.
5. A recording apparatus for recording a series of information data onto a recording
medium (20) having a first recording layer and a second recording layer, comprising
a data dividing circuit (10) for dividing said information data into a plurality of
data blocks (D1-D6), obtaining a first data block group containing data blocks (D1, D3, D5) selected from said data blocks as information data for recording in the first layer,
and obtaining a second data block group containing data blocks (D2, D4, D6) among said data blocks as information data for recording in the second layer; and
a recording means (14) for recording said information data for recording in the first
layer into said first recording layer and recording said information data for recording
in the second layer into said second recording layer,
characterized in that
said data dividing circuit (10) adds a jump instruction (JA1-JA6) to a first data block to be recorded in one of said first recording layer and said
second recording layer, and
said jump instruction (JA1 -JA6) designates a next reading destination (AD10-AD12, AD20-AD22) to at least a second data block of said data blocks in another one of said first
recording layer and said second recording layer.
6. An apparatus according to claim 5, wherein said first data group contains odd-numbered
data blocks (D1, D3, D5) among said data blocks, and said second data group contains even-numbered data blocks
(D2, D4, D6) among said data blocks.
7. An apparatus according to claim 5, wherein, when said continuous information data
is reproduced from said recording medium (20), said jump instruction (JA1-JA6) causes a reproduction of said first data block to automatically jump to a reproduction
of said second data block without interruption.
8. An apparatus according to claim 7, wherein said first data block group and said second
data block group are continuously reproduced without interruption such that said continuous
information data is reproduced without interruption.
9. A recording medium (20) having a first recording layer and a second recording layer,
wherein
a plurality of data blocks (D1-D6) indicative of a series of information data are distributed and recorded in said
first recording layer and said second recording layer,
characterized by
a jump instruction (JA1-JA6) to designate a next reading destination (AD10-AD12, AD20-AD22), which is in one of said first recording layer and said second recording layer,
wherein said jump instruction has been recorded in at least one of said data blocks
recorded in another one of said first recording layer and said second recording layer.
1. Aufzeichnungsverfahren zum Aufzeichnen einer Reihe von Informationsdaten auf ein Aufzeichnungsmedium
(20) mit mehreren Aufzeichnungsschichten, mit
dem Aufteilen der Informationsdaten in mehrere Datenblöcke (D1-D6); und
dem Verteilen und Aufzeichnen der Datenblöcke in die unterschiedlichen Aufzeichnungsschichten
des Aufzeichnungsmediums,
dadurch gekennzeichnet,
dass wenigstens ein erster Datenblock der in einer der unterschiedlichen Aufzeichnungsschichten
aufgezeichneten Datenblöcke einen Sprungbefehl (JA1-JA6) enthält, um ein nächstes Leseziel (AD10-AD12, AD20-AD22) in einer anderen der unterschiedlichen Aufzeichnungsschichten zu bestimmen.
2. Verfahren nach Anspruch 1, bei welchem die Aufzeichnungsschichten des Aufzeichnungsmediums
(20) eine erste Aufzeichnungsschicht und eine zweite Aufzeichnungsschicht aufweisen,
wobei eine Gruppe von ungeradzahlig bestimmten Blöcken (D1, D3, D5) von den Datenblöcken in die erste Aufzeichnungsschicht aufgezeichnet wird und eine
Gruppe von geradzahlig bestimmten Blöcken (D2, D4, D6) von den Datenblöcken in die zweite Aufzeichnungsschicht aufgezeichnet wird.
3. Verfahren nach Anspruch 1, bei welchem, wenn die kontinuierlichen Informationsdaten
von dem Aufzeichnungsmedium wiedergegeben werden, die Sprungbefehle (JA1-JA6) eine Wiedergabe des ersten Datenblocks ohne Unterbrechung automatisch zu einer Wiedergabe
eines zweiten Datenblocks in der anderen der unterschiedlichen Aufzeichnungsschichten
springen lassen.
4. Verfahren nach Anspruch 3, bei welchem die in den unterschiedlichen Aufzeichnungsschichten
aufgezeichneten Datenblöcke (D1-D6) ohne Unterbrechung fortlaufend wiedergegeben werden, sodass die kontinuierlichen
Informationsdaten ohne Unterbrechung wiedergegeben werden.
5. Aufzeichnungsgerät zum Aufzeichnen einer Reihe von Informationsdaten auf ein Aufzeichnungsmedium
(20) mit einer ersten Aufzeichnungsschicht und einer zweiten Aufzeichnungsschicht,
mit
einer Datenteilungsschaltung (10) zum Aufteilen der Informationsdaten in mehrere Datenblöcke
(D1-D6), wodurch eine erste Datenblockgruppe mit Datenblöcken (D1, D3, D5), die aus den Datenblöcken als Informationsdaten zum Aufzeichnen in der ersten Schicht
ausgewählt sind, erhalten wird und eine zweite Datenblockgruppe mit Datenblöcken (D2, D4, D6) von den Datenblöcken als Informationsdaten zum Aufzeichnen in der zweiten Schicht
erhalten wird; und
einer Aufzeichnungseinrichtung (14) zum Aufzeichnen der Informationsdaten zum Aufzeichnen
in der ersten Schicht in die erste Aufzeichnungsschicht und Aufzeichnen der Informationsdaten
zum Aufzeichnen in der zweiten Schicht in die zweite Aufzeichnungsschicht,
dadurch gekennzeichnet,
dass die Datenteilungsschaltung (10) einem ersten Datenblock, der in einer der ersten
Aufzeichnungsschicht und der zweiten Aufzeichnungsschicht aufgezeichnet werden soll,
einen Sprungbefehl (JA1-JA6) hinzufügt, und
dass der Sprungbefehl (JA1-JA6) ein nächstes Leseziel (AD10-AD12, AD20-AD22) für wenigstens eine zweiten Datenblock der Datenblöcke in einer anderen der ersten
Aufzeichnungsschicht und der zweiten Aufzeichnungsschicht bestimmt.
6. Gerät nach Anspruch 5, bei welchem die erste Datengruppe ungeradzahlige Datenblöcke
(D1, D3, D5) von den Datenblöcken enthält und die zweite Datengruppe geradzahlige Datenblöcke
(D2, D4, D6) von den Datenblöcken enthält.
7. Gerät nach Anspruch 5, bei welchem, wenn die kontinuierlichen Informationsdaten von
dem Aufzeichnungsmedium (20) wiedergegeben werden, der Sprungbefehl (JA1-JA6) eine Wiedergabe des ersten Datenblocks ohne Unterbrechung automatisch zu einer Wiedergabe
des zweiten Datenblocks springen lässt.
8. Gerät nach Anspruch 7, bei welchem die erste Datenblockgruppe und die zweite Datenblockgruppe
ohne Unterbrechung fortlaufend wiedergegeben werden, sodass die kontinuierlichen Informationsdaten
ohne Unterbrechung wiedergegeben werden.
9. Aufzeichnungsmedium (20) mit einer ersten Aufzeichnungsschicht und einer zweiten Aufzeichnungsschicht,
bei welchem
mehrere Datenblöcke (D1-D6), die eine Reihe von Informationsdaten angeben, in der ersten Aufzeichnungsschicht
und der zweiten Aufzeichnungsschicht verteilt und aufgezeichnet sind,
gekennzeichnet durch
einen Sprungbefehl (JA1-JA6), um ein nächstes Leseziel (AD10-AD12, AD20-AD22) zu bestimmen, welches in einer der ersten Aufzeichnungsschicht und der zweiten Aufzeichnungsschicht
ist, wobei der Sprungbefehl in wenigstens einem der in einer anderen der ersten Aufzeichnungsschicht
und der zweiten Aufzeichnungsschicht aufgezeichneten Datenblöcke aufgezeichnet worden
ist.
1. Procédé d'enregistrement pour enregistrer une série de données d'informations sur
un support d'enregistrement (20) ayant une pluralité de couches d'enregistrement,
comprenant :
la division desdites données d'informations en une pluralité de blocs de données (D1 à D6) ; et
la distribution et l'enregistrement desdits blocs de données dans différentes couches
d'enregistrement dudit support d'enregistrement,
caractérisé en ce que
au moins un premier bloc de données desdits blocs de données enregistrés dans une
desdites différentes couches d'enregistrement comprend une instruction de saut (JA
1 à JA
6) pour désigner une destination de lecture suivante (AD
10 à AD
12, AD
20 à AD
22) dans une autre desdites différentes couches d'enregistrement.
2. Procédé selon la revendication 1, dans lequel les couches d'enregistrement dudit support
d'enregistrement (20) comprennent une première couche d'enregistrement et une seconde
couche d'enregistrement, un groupe de blocs désignés par des nombres impairs (D1, D3, D5) parmi lesdits blocs de données est enregistré dans ladite première couche d'enregistrement,
et un groupe de blocs désignés par des nombres pairs (D2, D4, D6) parmi lesdits blocs de données est enregistré dans ladite seconde couche d'enregistrement.
3. Procédé selon la revendication 1, dans lequel, lorsque lesdites données d'informations
continues sont reproduites à partir dudit support d'enregistrement, lesdites instructions
de saut (JA1 à JA6) provoquent une reproduction dudit premier bloc de données pour sauter automatiquement
à une reproduction d'un second bloc de données dans une autre desdites différentes
couches d'enregistrement sans interruption.
4. Procédé selon la revendication 3, dans lequel ladite pluralité de blocs de données
(D1 à D6) enregistrées dans lesdites différentes couches d'enregistrement sont reproduites
de façon continue sans interruption pour que lesdites données d'informations continues
soient reproduites sans interruption.
5. Appareil d'enregistrement pour enregistrer une série de données d'informations sur
un support d'enregistrement (20) ayant une première couche d'enregistrement et une
seconde enregistrement, comprenant un circuit de division de données (10) pour diviser
lesdites données d'informations en une pluralité de blocs de données (D1 à D6), pour obtenir un premier groupe de blocs de données contenant des blocs de données
(D1, D3, D5) sélectionnés à partir desdits blocs de données comme des données d'informations
pour l'enregistrement dans la première couche, et pour obtenir un second groupe de
blocs de données contenant des blocs de données (D2, D4, D6) parmi lesdits blocs de données comme des données d'informations pour l'enregistrement
dans la seconde couche, et
un moyen d'enregistrement (14) pour enregistrer lesdites données d'informations
pour l'enregistrement dans la première couche dans ladite première couche d'enregistrement
et pour enregistrer lesdites données d'informations pour l'enregistrement dans la
seconde couche dans ladite seconde couche d'enregistrement,
caractérisé en ce que
ledit circuit de division de données (10) ajoute une instruction de saut (JA1 à JA6) au premier bloc de données à enregistrer dans une de ladite première couche d'enregistrement
et de ladite seconde couche d'enregistrement, et
ladite instruction de saut (JA1 à JA6) désigne une destination de lecture suivante (AD10 à AD12, AD20 à AD22) à au moins un second bloc de données desdits blocs de données dans une autre de
ladite première couche d'enregistrement et de ladite seconde couche d'enregistrement.
6. Appareil selon la revendication 5, dans lequel ledit premier groupe de données contient
des blocs de données numérotés impairs (D1, D3, D5) parmi lesdits blocs de données, et ledit second groupe de données contient des blocs
de données numérotés pairs (D2, D4, D6) parmi lesdits blocs de données.
7. Appareil selon la revendication 5, dans lequel, lorsque lesdites données d'informations
continues sont reproduites à partir dudit support d'enregistrement (20), ladite instruction
de saut (JA1 à JA6) provoque une reproduction dudit premier bloc de données pour sauter automatiquement
à une reproduction dudit second bloc de données sans interruption.
8. Appareil selon la revendication 7, dans lequel ledit premier groupe de blocs de données
et ledit second groupe de blocs de données sont reproduits de façon continue sans
interruption pour que lesdites données d'informations continues soient reproduites
sans interruption.
9. Support d'enregistrement (20) ayant une première couche d'enregistrement et une seconde
couche d'enregistrement, dans lequel
une pluralité de blocs de données (D1 à D6) indicateurs d'une série de données d'informations est distribuée et enregistrée
dans ladite première couche d'enregistrement et ladite seconde couche d'enregistrement,
caractérisé par
une instruction de saut (JA1 à JA6) pour désigner une destination de lecture suivante (AD10 à AD12, AD20 à AD22), qui est dans une de ladite première couche d'enregistrement et de ladite seconde
couche d'enregistrement, dans lequel ladite instruction de saut a été enregistrée
dans au moins un desdits blocs de données enregistrés dans une autre de ladite première
couche d'enregistrement et de ladite seconde couche d'enregistrement.